Yarn-positioning device for looms for weaving tufted pile fabric



Dec. 31; 1929. E. F. CLARK 1,742,024

YARN POSITIONING DEVICE FOR LQOMS FOR WEAVING' TUFTED FILE FABRIC Filed Feb. 5, 1929 T ORNE Patented Dec. 31, 1929 UNITED. STATES PATENT OFFICE EUGENE F. CLARK, OF DAMARISCOTTA, MAINE, ASSIGNOR TO MAR-SHALL FIELD MILLS CORPORATION, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN- SYLVAN'IA ym-rosr'rromnonnvron FOR LOOMS noawnavme 'rur'rnn FILE FABRIC Application filed February 5, 1929.. Serial No. 337,627.

dated August 23, 1926,

The object of my present invention is to improve the yarn positioning devices of the aforesaid loom by the addition of yieldable or spring means constructed and arranged to .act upon the yarn positioning blades to hold them normally in substantially parallel relationship and to return them to their normal position when they are moved therefrom the combinations against the action of the springmeans and released and to permit them to have independent lateral movement against the spring means so that they may engage the yarn gulding tubes of a tube frame and accommodate themselves to any irregularities which may be present in the tubes and the spaces between themas the blades are moved into such spaces. a f

l The invention consists of the elements and of them hereinafter described. I i a w i In the accompanying drawings illustrating the invention,

Figural is a top view of a yarn positioning device embodying my invention showing parts ofthe blade carrying bar broken away and illustratingthe positions of the tubes of a tubeframe in the position they occupy with relation to the yarn positioning blades before the blades are moved into the spaces between the tubes.

Figure 2is a verticalsection through the blade. carrying bar, on line 2-2 of Fig. 1.

Figure 3 is a top view enlarged of aportion of the blade carrying bar showing a blade therein moved laterally in one direction from its normal position'against the action of its spring means.

Figure 4 is a similar View showing a blade moved laterally in the opposite direction against the action of its spring means.

1 Figure 5 is anend view of one of the blades, enlarged. 1

Figure 6 is a side view of one of the blades.

Referring to the drawings 3 designates a cated within a longitudinally bar and 4 a row of yarn positioning blades which project from the bar 3 in lateral spaced relation to each other. i

The bar 3 carrying the blades 4is adapted to besupported and actuated with relation to the tubes of the tube frames and the grippers for receiving the yarn from the tube frames for causing the blades 4 to position the yarn with respect to the grippersin a loom for weaving tufted pile fabric in the same manner that the bar 87 is supported and actuated with relation to the tubes 30 of the tube frames and the yarn grippers 31 for causing the blades 113 carried by the bar 87 to position the yarn from the tubes with respect to the grippers 31 of the loom illustrated and described in the aforesaid Letters Patent No. 1,594,605.

The yarn positioning blades 4 extend toward the position occupied by the tubes, indicated at 5 in Fig. 1, of a tube frame when the bar 3 is in a loom. The blades 4 are arranged with their sides in vertical position so that the spaces between them will be alined with and opposite to the tubes 5 and the grippers (not shown) beneath the tubes 5 to receive yarn therefrom. r

The blades 4 are shaped as clearly shown in the drawings, and they are set in transverse grooves6 formed in the bar 3 and they are retained therein by a rod 7 which is loextending groove 8 in the bar 8. The rod 7 extends through the groove 8 and through alined notches 9 in the upper edge portions of the 7 blades 4. The rod 7 is held in place within the groove 8 and notches 9 by a bar of angle iron 10 having'one flange thereof extending over the top of the bar 3 and over the rod 7 and having the other flange thereof extending adjacent to one of the longitudinal vertical sides of the bar 3 and secured thereto by portionsof each spring 12 press against one side wall of the groove 6 which it is 10- cated, and the central portion of each spring 12 presses against the adjacent blade 4 and presses it toward the opposite side wall of the groove 6 in which the spring is located. The springs 12 are held in place within the grooves 6 by the rod 7 which extends through notches 13 in the springs. 7

The central portions of the springs 12 exert pressure in the same direction and press the blades against the opposing side walls of the grooves 6 and maintain them yieldingly against such walls in the normal or inactive position of the bar 3 and blades 4, as shown in Fig. 1 of the drawings.

The grooves 6 are uniformly spaced along the bar 3 with the distance between the parallel side walls of each groove somewhat greater than the combined thicknesses of the .blade 4 andyspring 12 therein so that the springs 12 will hold the blades 4 normally in parallel, spaced relation to each other with equal spaces between them and yet permit each blade to be moved laterally independently of and relatively to the other blades either in one direction from the normal position of the blade, as shown in Fig. 3, or in the reverse direction from the normal position of the blade, as shown in Fig. 4. Thus it will be understood that the free end portions of the blades may be moved laterally in either direction independently of each other against the action of the springs when pressure is applied to the blades, and that after such pressure is removed the springs will return the blades to thenormal position thereof.

The tubes or yarn guides 5 of the tube frames are Wedge shaped in cross, section so that their diverging side walls will form spaces bet-ween tubes having wide entrance openings facing the yarn positioning blades to ensure the entrance of the blades 4 into such spaces irrespective of any slight irregularities which may be present in the spaced relation of the tubes due to the accidental bending thereof when in service or due to other causes; so that, while the walls of the slots 6 and the springs 12 will hold the blades 4 normally in parallel relation and in registry with the normal spaces between the tubes 5,3the springs 12 will permit any of the blades 4 to be moved laterally by the tubes 5 should any of the blades encounter any of the tubes when the bar 3 is operated to move the blades into the spaces between the tubes. Should any of the blades 4 be moved laterally by encountering any of the tubes 5 the springs 12 will return such blades to normal position relatively to the bar 3 when the bar is returned tothe normal position shown in Fig. 1.

The portion of each blade 4 which projects from the bar 3 and which is adapted to enter a space between two adjacentyarn'guiding tubes 5 has its opposite flat side surfaces con; verging upwardly from the bottom thereof to a knife-like edge at the top thereof to conform to the angles of the opposing sides of the tubes 5 which are set at similar angles, to lessen the liability of the blades encountering the walls of the tubes as the blades are moved into the spaces between them.

I claim as my invention:

1. A yarn positioning device for looms for weaving tufted pile fabric, comprising a bar provided with a row of yarn" positioning blades extending therefrom in spaced, substantially parallel relationship in the normal position of the blades, and spring means acting upon the blades, the blades being capable of independent lateral movement from the normal position thereof against the action of said means.

2. A yarn positioning device for looms for weaving tufted pile fabric, comprising a bar provided with transverse parallel grooves, a row of yarn positioning blades within the grooves and extending from the bar, means to retain the blades within the grooves, and spring means acting upon the blades, the blades being capableof independent lateral movement against the action of said means.

3. A yarn positioning device for looms for weaving tufted pile fabric, comprising a bar provided with transverse parallel grooves, a row of yarn positioning blades within the grooves and extending from the bar, springs within the grooves acting upon the blades, and a common means for retaining the blades and springs within the grooves, the blades being capable of independent lateral movement against the action of the springs.

4. A yarn positioning device forlooms for weaving tufted pile fabric, comprising a bar provided with transverse parallel grooves, a row of yarn positioning blades within the grooves and extending from the bar, a spring within each groove pressing the blade therein normally against one side wall of the groove, the blades being capable of independent lateral movement against the action of the springs.

5. A yarn positioning device for looms for weaving tufted pile fabric,,comprising a bar provided with transverse parallel grooves, a row of yarn positioning blades within the grooves and extending from the bar, a bow spring within each groove having its end portions pressing against one sidewall of the groove and having its central portion pressing against the blade within the groove and pressing the blade against the opposite side wall of the groove, the blades being capable of independent lateral movement against the action of the springs.

6. A yarn positioning device for looms for weaving tufted pile fabric, comprising a bar provided with transverse parallel grooves and a longitudinal groove intersecting the transverse grooves, a row of yarn positioning blades within the transverse'grooves and eX- tendingfrom the bar and having notches F therein alined with the longitudinal groove,

a retaining rod within the transverse groove and said notches, means to hold the rod in place, and spring means acting upon the blades and retained within the transverse grooves by the rod, the blades being capable of independent lateral movement against the action of said means.

7. A yarn positioning device for looms for Weaving tufted pile fabric, comprising a bar provided with transverse parallel grooves and a longitudinal groove intersecting the transverse grooves, a row of yarn positioning blades within the transverse grooves and extending from the bar and having notches therein alined with the longitudinal groove,

a bow spring within each groove having its end portions pressing against one side wall of the groove and having its central portion pressing against the blade within the groove and pressing the blade against the opposite side wall of the groove, the blades being capable of independent lateral movement against the action of the springs, each spring having a notch therein alined with the notches in the blades, a retaining rod within said notches and the longitudinal groove, and means to hold the rod in place.

In testimony whereof I afiix my signature.

EUGENE F. CLARK. 

